Resistance element



Mar. 13, 1923.

A. R. SWOBODA RESISTANCE ELEMENT Filed Mar. 10, 1922 WV/VfO/ Add h RSwokoda.

XMKZM A ry Patented Mar. 13, 1923.-

UNITED STATES, PATENT OFFICE.

ADOLPH R. SWOBODA, OF NEWARK, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRICCOMPANY, INCORPORATED, OF

NEW YORK, N. Y., A CORPORATION OF NEW YORK.

RESISTANCE ELEMENT.

Original application filed December 6, 1920, Serial No-428,540. Dividedand this application filed larch 10, 1922. Serial No. 542,548.,

To all whom itqnay concern.

Be it known that I, Anonrii R. SwoBonA,

a citizen of the United States, residing at Newark, in the county-ofEssex, State of New Jersey, have invented certain new and usefulImprovements in Resistance Ele .a resistance element which is simple inconstruction, cheap in cost, and which may be easily mounted upon itssupporting mem-- .ber.

More specifically, the invention comprises a tiny resistance element,consisting of acoreless winding of insulated resistance wire formed intoan elongated unit and bound together, the unit being so small and lightand of such character that it may be secured to a supporting member byan adhesive ma-v terial. This unitary structure is particu larly adaptedfor use in rheostats and other apparatus, where it is necessary toprovide an eflicient and very compact resistance element.

Other objects and features of the invention willappear from aconsideration of the following description taken in conjunction with theaccompanying'drawing and the appended claims.

In the drawing, Fig. 1 is a front view, part in plan and part in sectionshowing the invention in its preferred form;

Fig. 2 is a perspective view of the assembled resistance element; and

Fig. 3 is a top elevation of a rheostat equipped with several suchresistance elements.

Referring to the drawings, the resistance element consists of very smallcoreless windings of high resistance insulated wire 5. A lead 6 offairly heavy gauge stranded copper wire is soldered to each end of thewire 5, and a sleeve 7, of varnished tubing or other comparatively stiffmaterial, is slipped over the leads. These sleeves or splints not onlyact as an insulation for the copper leads, but they serve as reinforcingmembers for the element. The assembled resist-' plate 9, and is a anceelement is formed into an elongated unit of substantially the samelength as the sleeves 7, and is tied together at its middle p ortignwith a loop of thread 8, as shown in fieferring particularly .to Fig. 3,there is shown a rheostat mounting plate 9, supporting an arcuate row offixed contacts 10,each of which extends through anaperture in the platein a manner well understood in the art. A contacting successively engagethe fixed contact members 10. Connected between succeeding contacts 10are the small resistance elements which lie flat against the mountingplate 9 and are secured thereto by an application of gated unit, andmeans forbinding the turns together.

2. A resistance element comprising an elongated coreless winding ofinsulatedwire, two sleeves, one for each terminal of the winding, saidsleeves situated on opposite sides of said winding and adapted to serveas a reinforcement therefor, and means for securing'th'e winding andsleeves together.

3. A resistance element comprising accreless winding of insulated wire,a member serving as a splint, and means securing said winding to saidsplint.

4. A resistance element comprisinga coreless winding of insulated wire,a pair of Amembers serving as splints and having a length at least equalto said winding, and means securing said splints together with thewinding between them.

5. A resistance element comprisingacoreless winding of insulated wire, aterminal wire'secured to each end of said winding and of heavier gaugethan said winding, two sleeves one for each of said terminals,

arm 11 is pivoted on theapted to rotate over and.

said sleeves serving as areinforcement for said winding, and means forsecuring the winding and sleeves together.

6. A resistance element comprisingacore- .5 less winding of insulatedwire, an uninsulated terminal wire secured to each end of said windingand of heavier gauge than

